广西大厂长坡锡多金属矿地质特征及矿化富集规律  

Geological characteristics and the mineralization-enrichment regularity of the Changpo Sn-polymetallic deposit in Dachang,Guangxi

作　　者：范森葵[1,2] 成永生[1,3] 蔡明海[4] 黎修旦[5] 陈承珍 陈艳[4] 

机构地区：[1]中南大学地球科学与信息物理学院,长沙410083 [2]广西215地质队有限公司,广西柳州545006 [3]广西华锡集团股份有限公司,广西柳州545006 [4]广西大学资源与冶金学院,南宁530004 [5]广西壮族自治区国土资源厅,南宁530000

出　　处：《地质找矿论丛》2011年第3期266-271,共6页Contributions to Geology and Mineral Resources Research

基　　金：国土资源部危机矿山接替资源勘查项目(编号:200545022;20089946-3);广西有色金属集团有限公司地质找矿科研项目(编号:GYDK090006)联合资助

摘　　要：文章在阐述长坡锡多金属矿床地质特征的基础上总结了矿化富集规律:①长坡锡多金属矿床由上部锡石-硫化物矿体和下部夕卡岩型锌铜矿体组成,锡石-硫化物型矿体形态主要表现为大脉型、细脉带型以及似层状;夕卡岩型锌铜矿化主要沿赋矿岩石的裂隙充填、交代,形成细脉状、层状以及浸染状矿化,矿体分为2段,南西段为锡多金属硫化物矿,北东段为锌铜矿;②长坡锡多金属矿床具有明显的水平以及垂向分带特征,平面上从岩体中心向外依次为Zn,Cu→(W,Sb)→Sn,Zn→Sn多金属→(Pb,Zn,Ag);垂向上自下而上依次为Zn,Cu→Sn,Zn→Sn多金属→(Pb,Zn,Ag);③长坡锡多金属矿床矿化富集与构造关系密切,尤其是次级构造部位,矿化富集程度高。夕卡岩型锌铜矿富集受花岗岩体影响明显,靠近花岗岩体矿化增强。Located in Guangxi Autonomous Region of south China Changpo Sn-polymetallic deposit is the largest ore deposit in metal resources. This paper sumarizes the mineralization-enrichment regularity based on description of its geological characteristics as follows： （1） The deposit is composed of the upper cassiterite sulfide ore bodies and lower skarn type Zn-Cu ore bodies. Cassiterite-sulfide ore bodies occur as lode, veinlet zone and stratiform and skarn type Zn-Cu ore bodies as crack-filling, replacement, veinlet, layeroid and dissemination mineralization. The ore bodies are divided into two domains, i. e the southwest Sn-polymetallic sulfide ore domain and the northeast Zn-Cu ore domain. （2） vertical and horizontal zonation. In plan outward fron center of the intrusion are zones of Zn,Cu→（W,Sb）→Sn,Zn→Sn-polymetal→ （Pb,Zn,Ag） and vertical zones from botoom to top Zn, Cu→Sn, Zn→Sn-polymetal→（Pb, Zn, Ag）. （3） Mineralization-enrichment of the deposit is closely related to tectonics, especially to the sub-structures at which mineralization-enrichment is intense. Skarn type Zn-Cu mineralization-enrichment is clearly influnced by granitic intrusion, the nearer to the intrusion the stronger the mineralization.

关 键 词：长坡锡多金属矿床 矿床地质 矿化富集 广西壮族自治区 

分 类 号：P612[天文地球—矿床学] P618.4[天文地球—地质学]